Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net loss	$ (2,455,064)	$ (151,391)	$ (2,535,260)	$ (243,569)
Denominator:
Average number of common shares outstanding (in shares)	80,941,000	65,024,000	77,151,000	63,983,000
Basic and diluted net loss per share (in usd per share)	$ (30.33)	$ (2.33)	$ (32.86)	$ (3.81)
Anti-dilutive securities excluded from earnings per share calculation	2,650,893	1,886,269	2,391,103	1,347,812
Share-based awards exercised or released
Stock options exercised (in shares)	0	8,659	0	18,300
Restricted stock units vested (in shares)	23,388	42,849	119,009	78,552
Total	23,388	51,508	119,009	96,852